22116099521 has 4 divisors (see below), whose sum is σ = 22116404100. Its totient is φ = 22115794944.

The previous prime is 22116099487. The next prime is 22116099529. The reversal of 22116099521 is 12599061122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12599061122 = 2 ⋅6299530561.

It can be written as a sum of positive squares in 2 ways, for example, as 5913610000 + 16202489521 = 76900^2 + 127289^2 .

It is a cyclic number.

It is not a de Polignac number, because 22116099521 - 2¹⁰ = 22116098497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22116099529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26945 + ... + 212033.

It is an arithmetic number, because the mean of its divisors is an integer number (5529101025).

Almost surely, 2^22116099521 is an apocalyptic number.

It is an amenable number.

22116099521 is a deficient number, since it is larger than the sum of its proper divisors (304579).

22116099521 is a wasteful number, since it uses less digits than its factorization.

22116099521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304578.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 22116099521 in words is "twenty-two billion, one hundred sixteen million, ninety-nine thousand, five hundred twenty-one".